Firearm magazine



FIG. 1 is a top-rear-right isometric view of a firearm magazine, showing my design;

FIG. 2 is a bottom-front-left isometric view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a left side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken line showing in the Figures illustrates portions of the firearm magazine and forms no part of the claimed design. 

CLAIM The ornamental design for a firearm magazine, as shown and described. 